Technical Specifications:

• Model Number: AS-BDAU-208
• Compatible Indoor Units: AS-S985-022 (3.5 kW), AS-S908-110 (2.5 kW)
• Cooling Capacity: 3.5 kW (12,000 BTU/h) — nominal
• Heating Capacity: 4.0 kW (13,600 BTU/h) — nominal
• Refrigerant: R32 (GWP 675)
• Refrigerant Charge: 1.15 kg
• Compressor Type: DC Inverter Rotary (Mitsubishi Electric / TCL compressed — AEG branded)
• Compressor RPM Range: 15–120 Hz (variable)
• Power Supply: 230V / 50Hz / 1-Phase
• Cooling Power Input: 1,050 W
• Heating Power Input: 1,120 W
• EER: 3.33 W/W
• COP: 3.57 W/W
• SEER: 8.5 (A+++)
• SCOP: 5.1 (A+++)
• Fan Motor: DC brushless motor
• Fan Diameter: 400 mm
• Airflow Rate (Cooling): 2,400 m³/h
• Airflow Rate (Heating): 2,200 m³/h
• Noise Level (Cooling): 54 dB(A)
• Noise Level (Heating): 55 dB(A)
• Operating Temperature Range: -15°C to +46°C (cooling) / -15°C to +24°C (heating)
• Defrost Method: Reverse cycle hot gas defrost
• Dimensions (W x H x D): 770 mm x 540 mm x 285 mm
• Weight (Net): 32 kg
• Connection Pipe Size: Liquid Ø 6.35 mm / Gas Ø 12.7 mm
• Max Pipe Length: 25 m
• Max Height Difference: 15 m

Material Composition:

• Outer Casing: Galvanized steel with polyester powder coat (RAL 9010 White)
• Condenser Coil: Hydrophilic-coated aluminum fins with internal copper tubes
• Fan Blade: Glass-fiber reinforced ABS (aerodynamically optimized)
• Compressor Housing: Cast aluminum with vibration isolation mounts
• Base Frame: Galvanized steel with rubber anti-vibration feet
• Electronic Expansion Valve: Brass body with step motor actuator
• Discharge Muffler: Acoustic foam-lined pipe section

Structural Features:

• Installation Type: Floor-mounted or wall-bracket mounted (bracket included)
• Fan Direction: Top-discharge (vertical airflow)
• Service Valves: 2x service port valves (liquid + gas) with dust caps
• Drain Connection: Gravity drain port (Ø 16 mm) for condensate
• Electrical Terminal Block: 4-terminal block inside weatherproof compartment
• Anti-Vibration: 4 rubber isolation mounts between compressor and base frame

Working Principle:
The DC inverter compressor modulates speed between 15 Hz and 120 Hz to match the thermal load demanded by the indoor unit. In cooling mode, high-pressure high-temperature R32 gas from the compressor flows to the outdoor condenser coil, where the axial fan blows ambient air across the coil to reject heat. The refrigerant condenses to liquid, passes through the electronic expansion valve (which meters flow based on superheat feedback), and travels to the indoor evaporator via the liquid line. In heating mode, the 4-way reversing valve switches the cycle — the outdoor coil becomes the evaporator (absorbing heat from ambient air, even at -15°C), and the indoor coil becomes the condenser (releasing heat into the room). Hot gas defrost periodically reverses flow to melt frost on the outdoor coil.

Advantages & Highlights:

• A+++ Efficiency: SEER 8.5 / SCOP 5.1 — top-tier performance.
• R32 Refrigerant: 68% lower GWP than R410A — F-Gas Regulation compliant.
• Wide Operating Range: Cooling down to -15°C, heating down to -15°C — suitable for cold climates.
• DC Inverter Compressor: Continuous modulation eliminates on/off cycling — 40% energy savings vs. fixed-speed.
• Quiet Operation: 54 dB(A) — aerodynamic fan blade + acoustic muffler + vibration isolation.
• Hot Gas Defrost: No electric defrost heater — saves energy and eliminates defrost-cycle temperature dips.

Applicable Industries / Use Cases:

• Residential single-family homes
• Townhouses and duplexes
• Small commercial offices (up to 35 m² per indoor unit)
• Retail shops and showrooms
• Hotel guest rooms

Installation Requirements:

• Location: Outdoor, shaded area with unrestricted airflow — minimum 30 cm clearance on all sides.
• Mounting: Floor-mounted on level concrete pad OR wall-mounted with AEG bracket kit (sold separately) — minimum 20 cm above ground.
• Refrigerant Piping: Copper tubes Ø 6.35 mm (liquid) / Ø 12.7 mm (gas); vacuum-brazed joints required; nitrogen pressure test at 4.0 MPa before charging.
• Electrical: Dedicated 16A circuit with RCD/MCB, 230V single-phase; outdoor-rated cable.
• Drainage: Connect condensate drain to floor drain or approved discharge point — minimum 1% fall.
• Pipe Insulation: Insulate both liquid and gas lines with 13 mm elastomeric foam insulation to prevent condensation.
• Vacuum Pump Down: Pull vacuum to 500 microns for minimum 30 minutes before charging R32.

Usage Precautions:

• R32 is mildly flammable (A2L): No open flames or smoking near the unit during installation or service.
• Do not mix refrigerants: R32 systems must never be charged with R410A or R22.
• Service valves: Keep dust caps on when not connected — moisture ingress destroys the expansion valve.
• Winter operation: If the unit will not run for extended periods in freezing weather, disconnect power and cover the unit.
• Clean condenser coil: Wash with low-pressure water (max 400 kPa) every 6 months — do not use high-pressure jets (damages fins).
• Leveling: Unit must be perfectly level — oil return to compressor depends on correct tilt.
• All refrigerant work must be performed by F-Gas certified technicians (EU Regulation 517/2014).